I just upgraded a snap 1000 from a 40Gb to a 120Gb and found what I feel is an easy way to do it:
1. go to
http://www.ultimatebootcd.com/ and get the free ISO
2. connect your old drive as master and new drive as slave.
3. boot using ultimate boot cd and use the clone tool to copy old HD to new HD
4. install new HD, go to
http://yourserver/config/debug and paste the command "config devices format 10000 /reinit".
5 Reboot
Once rebooted the drive will reformat and the correct sive will be available.